Provided is a reflective glitter heat transfer sheet having a retroreflective structure. The reflective glitter heat transfer sheet includes: a reflective glitter layer comprising an adhesive, and glass beads and glitter particles embedded inside the adhesive; a primer layer disposed on the reflective glitter layer; and a hot melt layer formed on the primer layer for conducting heat transfer to an article to which the reflective glitter heat transfer sheet is to be applied. Each of the glass beads is a retroreflector for achieving retroreflection, and each of the glitter particles is a reflector for achieving diffuse reflection.

Provided is a reflective glitter heat transfer sheet having a retroreflective structure. The reflective glitter heat transfer sheet includes: a reflective glitter layer comprising an adhesive, and glass beads and glitter particles embedded inside the adhesive; a primer layer disposed on the reflective glitter layer; and a hot melt layer formed on the primer layer for conducting heat transfer to an article to which the reflective glitter heat transfer sheet is to be applied. Each of the glass beads is a retroreflector for achieving retroreflection, and each of the glitter particles is a reflector for achieving diffuse reflection.

An equine safety device for reducing risk of a vehicle-horse collision includes a set of safety reflectors. Each safety reflector is selectively couplable to at least one of hair of a tail of a horse and hair of a forelock of the horse. The set of safety reflectors is configured to enhance visibility of the horse to an operator of vehicle via light from headlights of the vehicle being reflected back to the operator.

An equine safety device for reducing risk of a vehicle-horse collision includes a set of safety reflectors. Each safety reflector is selectively couplable to at least one of hair of a tail of a horse and hair of a forelock of the horse. The set of safety reflectors is configured to enhance visibility of the horse to an operator of vehicle via light from headlights of the vehicle being reflected back to the operator.

A flat security element with microreflectors arranged as a microreflector pattern in a main plane of the security element. The microreflectors present a motif made up of image points to a viewer. The motif appears for the viewer as lying outside the main plane of the security element. Two of the microreflectors are adjusted in each case to produce one of the image points of the motif appearing for the viewer as lying outside the main plane. The microreflector pattern has several groups of microreflectors. Each of the groups is provided to represent to the viewer a perspective view of the motif after tilting the security element about an axis lying in the main plane. Image points of the motif are shifted by shift ranges of different sizes through the tilting.

A ballistic detection system includes one or more light sources configured to transmit collimated light through a detection area; a receiver array arranged with respect to the detection area to receive the collimated light in multiple side-by-side channels, the receiver array including (i) light detectors corresponding to the multiple side-by-side channels, and (ii) lenses arranged to focus respective portions of the collimated light, which has transited the detection area, onto respective ones of the light detectors corresponding to the multiple side-by-side channels; and a ballistics analysis computer coupled with the receiver array and programmed to identify a location of a projectile that passes through the detection area by performing ratiometric comparison of signal data from the light detectors, the signal data corresponding to fractional blockage, by the projectile, of the collimated light in one or more of the multiple side-by-side channels.

A ballistic detection system includes one or more light sources configured to transmit collimated light through a detection area; a receiver array arranged with respect to the detection area to receive the collimated light in multiple side-by-side channels, the receiver array including (i) light detectors corresponding to the multiple side-by-side channels, and (ii) lenses arranged to focus respective portions of the collimated light, which has transited the detection area, onto respective ones of the light detectors corresponding to the multiple side-by-side channels; and a ballistics analysis computer coupled with the receiver array and programmed to identify a location of a projectile that passes through the detection area by performing ratiometric comparison of signal data from the light detectors, the signal data corresponding to fractional blockage, by the projectile, of the collimated light in one or more of the multiple side-by-side channels.

Retroreflective materials and articles are enabled that increase the retroreflectivity of reflective materials or articles for roadway, automotive, and safety purposes by incorporating retroreflective elements that exhibit near-ideal Total Internal Reflection (TIR).

A retroreflective system is disclosed that includes a retroreflective sheet for retroreflecting light, and a light control film disposed on the retroreflective sheet. For a first wavelength, light incident on the light control film at each of a first and second angles of incidence is retroreflected. For a second wavelength, light incident on the light control film at the first, but not the second, angle of incidence is retroreflected.

A retroreflective system is disclosed that includes a retroreflective sheet for retroreflecting light, and a light control film disposed on the retroreflective sheet. For a first wavelength, light incident on the light control film at each of a first and second angles of incidence is retroreflected. For a second wavelength, light incident on the light control film at the first, but not the second, angle of incidence is retroreflected.